Definition of richterite in US English:

richterite

noun

Mineralogy
  • A ferromagnesian mineral of the amphibole group, occurring as elongated brown, yellow, red, or green crystals.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From the name of H. Theodor Richter, German metallurgical chemist + -ite, after German Richterit.

Pronunciation

richterite

/ˈrɪktərʌɪt/